The enhanced rate performance of LiFe0.5Mn0.5PO4/C cathode material via synergistic strategies of surfactant-assisted solid state method and carbon coating

2015 ◽  
Vol 3 (3) ◽  
pp. 996-1004 ◽  
Author(s):  
Xue Zhou ◽  
Ye Xie ◽  
Yuanfu Deng ◽  
Xusong Qin ◽  
Guohua Chen
Keyword(s):  
Solid State ◽  
Cathode Material ◽  
Carbon Content ◽  
Carbon Coating ◽  
High Rate ◽  
Cycle Performance ◽  
Rate Performance ◽  
Solid State Method ◽  
State Method ◽  
Surfactant Assisted

A high rate and cycle performance LiFe0.5Mn0.5PO4/C material was obtained by synergies of a surfactant-assisted solid state method and carbon content.

Improving the structural and cyclic stabilities of P2-type Na0.67MnO2 cathode material via Cu and Ti co-substitution for sodium ion batteries

2020 ◽  
Vol 56 (46) ◽  
pp. 6293-6296 ◽  
Author(s):  
Xueping Zhang ◽  
Feilong Qiu ◽  
Kezhu Jiang ◽  
Ping He ◽  
Min Han ◽  
...  
Keyword(s):  
Solid State ◽  
Cathode Material ◽  
Sodium Ion ◽  
Sodium Ion Batteries ◽  
Excellent Performance ◽  
Solid State Method ◽  
Co Substitution ◽  
State Method

An air-stable Na0.67Mn0.7Cu0.15Ti0.15O2 (NMCT) has been synthesized using a solid-state method. And it showed the excellent performance as a cathode material for sodium ion batteries.

Exploration of Na7Fe4.5(P2O7)4 as a cathode material for sodium-ion batteries

2016 ◽  
Vol 4 (42) ◽  
pp. 16531-16535 ◽  
Author(s):  
Yubin Niu ◽  
Maowen Xu ◽  
Bolei Shen ◽  
Chunlong Dai ◽  
Chang Ming Li
Keyword(s):  
Solid State ◽  
Cathode Material ◽  
Mechanical Milling ◽  
Sodium Ion ◽  
Sodium Ion Batteries ◽  
Solid State Method ◽  
State Method ◽  
First Time

A novel Na7Fe4.5(P2O7)4 compound was fabricated as a cathode for sodium-ion batteries by a mechanical milling assisted solid state method for the first time.

The Effect of Thermal Treatment Temperature and Duration on Electrochemistry Performance of LiNi1/3Co1/3Mn1/3O2 Cathode Materials for Lithium-ion Batteries

2018 ◽  
Vol 14 (5) ◽  
pp. 440-447 ◽  
Author(s):  
Gang Sun ◽  
Chenxiao Jia ◽  
Shuanlong Di ◽  
Jianning Zhang ◽  
Qinghua Du ◽  
...  
Keyword(s):  
Solid State ◽  
Thermal Treatment ◽  
Electrochemical Performance ◽  
Cathode Material ◽  
Lithium Ion Batteries ◽  
Cathode Materials ◽  
Raw Materials ◽  
Lithium Ion ◽  
Solid State Method ◽  
State Method

Background: LiNi1/3Mn1/3Co1/3O2 derived from the solid-state method suffers from the problem of significant irreversible charge-discharge behavior. To improve the electrochemical performance of LiNi1/3Mn1/3Co1/3O2, there are several important factors, such as starting raw materials, precursor, preparation method and conditions. In this work, the layered LiNi1/3Mn1/3 Co1/3O2 material was prepared by solid-state reaction. By varying the temperature and duration of synthesis thermal treatment, the greater crystallinity and well-ordered layered LiNi1/3Mn1/3Co1/3O2 cathode material has been successfully synthesized. The structural properties, morphology and electrochemical properties of LiNi1/3Mn1/3Co1/3O2 powders have been investigated in detail. Methods: LiNi1/3Co1/3Mn1/3O2 cathode material was synthesized via a high-temperature solid-state method. Stoichiometric amounts of Ni(CH3COO)2•4H2O, Co(CH3COO)2•4H2O, Mn(CH3COO)2• 4H2O, and Li2CO3 as raw materials were homogenized mixed in a ball mill for 8 h at 240 rpm. By varying the temperature and duration of synthesis thermal treatment, LiNi1/3Co1/3Mn1/3O2 cathode materials with different electrochemistry performance were achieved. (a) The effect of the temperature of synthesis thermal treatment on electrochemistry performance of LiNi1/3Co1/3Mn1/3O2 was explored by calcining the above mixed powder at 800°C, 850°C, 900°C, 950°C, and 1000°C for 12 h in air at a rate of 5°C min-1. Then the target product was prepared at last. The obtained compound was named as N-800, N-850, N-900, N-950 and N-1000, respectively. (b) In order to explore the effect of the duration of synthesis thermal treatment on electrochemistry performance of LiNi1/3 Co1/3Mn1/3O2 cathode material, the above mixed raw materials were calcined at 900°C for 4 h, 8 h, 12 h, 16 h and 20 h in air at a rate of 5°C min-1. The obtained compound was named as N-4, N-8, N- 12, N-16 and N-20, respectively. The N-900 and N-12 are the same sample. Results: The cathode material sintered at 900°C for 12 h revealed the best electrochemical performance, with high-capacity and recyclability compared with other materials. Its initial discharge capacity attains 182.4 mAh g-1 at 0.2 C in the voltage range of 2.5-4.6 V, which can be attributed to its greater crystallinity and well-ordered layered structure. Compared with other studies on lithium-ion batteries given in literature, this work provides a sample, optimal and mild synthetic conditions to synthesize the cathode materials with great electrochemistry performance. Conclusion: A greater crystallinity and well-ordered layered LiNi1/3Mn1/3Co1/3O2 powders had been successfully synthesized by mixing raw materials under various temperatures and duration of synthesis thermal treatment. The XRD results indicated the I(003)/I(104) values of N-900 (N-12) is 1.591 larger than 1.2, which illustrates no undesirable cation mixing to be occurred. In this work, from the results of electrochemical property experiments, it can be indicated that the optimal synthesized conditions are 900°C for 12 h. When the calcination temperature is too low and the calcined time is too short, the material is poorly crystalline and has a poor layer structure. When the calcination temperature is too high and the calcined time is too long, lithium salt is evaporated completely during the calcination process resulting in a poor electrochemistry performance.

An improved solid-state method for synthesizing LiNi0.5Mn1.5O4 cathode material for lithium ion batteries

2017 ◽  
Vol 715 ◽  
pp. 304-310 ◽  
Author(s):  
Yunlong He ◽  
Jie Zhang ◽  
Qiu Li ◽  
Yong Hao ◽  
Jianwen Yang ◽  
...  
Keyword(s):  
Solid State ◽  
Cathode Material ◽  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Solid State Method ◽  
State Method

Carbon coating on lithium iron phosphate (LiFePO4): Comparison between continuous supercritical hydrothermal method and solid-state method

2012 ◽  
Vol 198-199 ◽  
pp. 318-326 ◽  
Author(s):  
Seung-Ah Hong ◽  
Su Jin Kim ◽  
Jaehoon Kim ◽  
Byung Gwon Lee ◽  
Kyung Yoon Chung ◽  
...  
Keyword(s):  
Solid State ◽  
Hydrothermal Method ◽  
Carbon Coating ◽  
Lithium Iron Phosphate ◽  
Iron Phosphate ◽  
Solid State Method ◽  
State Method
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